The word "crack" in warez context means the action of removing the copy protection from commercial software. A crack is a program, set of instructions or patch used to remove copy protection from a piece of software or to unlock features from a demo or time-limited trial. There are also crack groups who work together in order to crack software, games, etc. If you search for "enemies closer 2013 720p crack", you will often see the word crack amongst the results, which implies it is the full version of the product.